Fletter Crunch Card Game

Fletter Crunch is a fun and exciting, quick mental-math game. 
Crunching numbers has never been this easy or this much fun. Eat the most number of “chocolate chip cookies” to win the game. Single number cards have a single cookie and Double Number cards have double cookies on them. When the cards open to the table you have to crunch the numbers by adding, subtracting or doing both - to achieve another number card already on the table. Shout out the calculation and then take all the cards used for it. For example: Numbers: 6, 3, 4 and 1 have opened to the table: 
 You can make: 4-3 = 1(and grab those 3 cards) or 4+3-1 = 6 (and grab more cards!)